CN202482457U - Auxiliary device for high pressure turbine journal inner diameter narrow side chromium plating - Google Patents
Auxiliary device for high pressure turbine journal inner diameter narrow side chromium plating Download PDFInfo
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- CN202482457U CN202482457U CN2011205297069U CN201120529706U CN202482457U CN 202482457 U CN202482457 U CN 202482457U CN 2011205297069 U CN2011205297069 U CN 2011205297069U CN 201120529706 U CN201120529706 U CN 201120529706U CN 202482457 U CN202482457 U CN 202482457U
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Abstract
An auxiliary device for a high pressure turbine journal inner diameter narrow side chromium plating is used for fixing a plated part, and matches with an auxiliary anode (1) to assist in chrome plating operation. The auxiliary device for the high pressure turbine journal inner diameter narrow side chromium plating is characterized by comprising a bolt (2), a cathode conductive plate (3), an annular insulation plate (4), a protection cathode (5), an end face insulation plate (7), a cone-shape insulation plate (8), and an inner cavity protection sleeve (9). When the auxiliary device for the high pressure turbine journal inner diameter narrow side chromium plating is used in the process of electrochromism of a workpiece with an inner cavity and a narrow side, uniform distribution of power lines is guaranteed, coatings are uniform, and ovality of the plated workpiece can not be increased. The auxiliary device for the high pressure turbine journal inner diameter narrow side chromium plating can obviously prolongs service life of the workpiece, reduces production cost of engines, and has predictable and relatively great economic value and social value.
Description
Technical field
The utility model relates to high-pressure turbine axle journal internal diameter narrow limit chromium plating supplementary unit and application, specifically provides the narrow limit chromium plating of a kind of high-pressure turbine axle journal internal diameter to use supplementary unit.
Background technology
In the prior art, the common metal material is when electrodeposited chromium, and often both sides are anode in the adopting process groove, and middle is the process method that negative electrode (part) carries out electrodeposited chromium, obtains the ideal chromium coating.When design of part complicacy or inner chamber, when electrodeposited chromium is carried out on surface, narrow limit,, use the chromium coating of traditional method preparation because the dispersive ability of plating bath and covering power are relatively poor; Be difficult to accomplish steady quality; The workpiece that processes can not get desirable chrome-plated surface, and fitting operation is comparatively complicated in the preparation process, and it is longer to produce setup time; Also cause workpiece to be reprocessed probably, thereby influenced the quality and the qualification rate of product.
People urgently hope to obtain the good high-pressure turbine axle journal internal diameter narrow limit chromium plating of a kind of technique effect and use supplementary unit.
The utility model content
The purpose of the utility model provides the good high-pressure turbine axle journal internal diameter narrow limit chromium plating of a kind of technique effect and uses supplementary unit.
The utility model provides the narrow limit chromium plating of a kind of high-pressure turbine axle journal internal diameter to use supplementary unit, and it is used for fixing by the plating part, and cooperates the auxiliary chromium plating operation of carrying out together with supplementary anode 1; It is characterized in that: it is made up of following several parts: screw 2, negative electrode conducting plates 3, ring-type insulcrete 4, protection negative electrode 5, end face insulcrete 7, taper insulcrete 8, inner chamber protective sleeve 9; Wherein:
Inner chamber protective sleeve 9 is arranged in by in the inner chamber of plating part 6, and inner chamber protective sleeve 9 main bodys are tubular structure, and its outer end is the annular end face perpendicular to axis direction, and it is connected as a whole with the tubular structure partial fixing of main body;
Taper insulcrete 8 is arranged in and on the pyramidal structure medial surface of plating part 6 and through the annular end face of outer end in the inner chamber protective sleeve 9 it is plated part 6 fixed and arranged together with respect to quilt;
Said supplementary anode 1 satisfies following requirement: its main part is a disk-like structure, is fixedly connected with an axial column or tubular structure and this structural arrangement on this disk-like structure spare and is plating part 6 one sides away from quilt;
One of them contacts the axial sides of end face insulcrete 7 with inner chamber protective sleeve 9 China and foreign countries' end axis annular end face laterally, and another axial sides of end face insulcrete 7 and the disk-like structure of supplementary anode 1 partly are in contact with one another;
Supplementary anode 1, end face insulcrete 7, inner chamber protective sleeve 9 threes are fixed together through axial arranged screw 2;
As being furnished with protection negative electrode 5, ring-type insulcrete 4, negative electrode conducting plates 3 vertically successively on the outside anchor ring structure that is needed chrome-plated surface by the narrow limit of internal diameter of the high-pressure turbine axle journal of plating part 6; Wherein: the axial two sides of protection negative electrode 5 contact with ring-type insulcrete 4 respectively with by the above-mentioned position of plating part 6, and the axial two sides of ring-type insulcrete 4 contact with negative electrode conducting plates 3 with protection negative electrode 5 respectively.
The content introduction relevant with the utility model:
With the narrow limit chromium plating of high-pressure turbine axle journal internal diameter with in the corresponding narrow limit of the high-pressure turbine axle journal internal diameter chrome-plating method of supplementary unit, satisfy following requirement successively:
At first taper insulcrete 8 is installed on the pyramidal structure medial surface of part, inner chamber protective sleeve 9 is installed on part then, the annular end face through outer end in the inner chamber protective sleeve 9 with taper insulcrete 8 with respect to part 6 fixed and arranged together;
Afterwards, end face insulcrete 7 is installed, one of them that makes its two axial sides and inner chamber protective sleeve 9 end axis annular end face laterally at home and abroad contact, and another axial sides of end face insulcrete 7 and the disk-like structure of supplementary anode 1 partly are in contact with one another;
Again, supplementary anode 1 is installed, and supplementary anode 1, end face insulcrete 7, inner chamber protective sleeve 9 threes are fixed together through axial arranged screw 2;
On the outside anchor ring structure that needs chrome-plated surface as the narrow limit of the internal diameter of the high-pressure turbine axle journal of part 6, arrange following three more then vertically successively: protection negative electrode 5, ring-type insulcrete 4, negative electrode conducting plates 3; Wherein: the axial two sides of protection negative electrode 5 contact with ring-type insulcrete 4 with the above-mentioned position of part 6 respectively, and the axial two sides of ring-type insulcrete 4 contact with negative electrode conducting plates 3 with protection negative electrode 5 respectively;
Negative electrode conducting plates 3, supplementary anode 1 are connected with the power supply of electroplanting device respectively, and this structural arrangement is away from part 6 one sides;
The link position of supplementary anode 1 is at the place, the hole that is used to connect of its column of arranging vertically or tubular structure part, the link position of negative electrode conducting plates 3 at it away from ring-type insulcrete 4 places;
The equipment that starts at last carries out the chromium plating operation to the narrow limit of high-pressure turbine axle journal internal diameter.
The chromed concrete operational path in the narrow limit of said high-pressure turbine axle journal internal diameter is: oil removing → clamping → activation → chromium plating → recovery trough washery → dehydrogenation;
Press the processing of chrome-plated process rules; The processing parameter that requires is following: chromic anhydride: 200～250g/l, sulfuric acid: 2～2.5g/l, trivalent chromium: 2-7.5g/l, temperature: 50-60 ℃, current density: 40-60A/dm
2
Also satisfy following requirement in the chrome-plating process of the narrow limit of said high-pressure turbine axle journal internal diameter: ovality is controlled in 0.02; Surfaceness reaches Ra=1.6 μ m;
Require coating and matrix bond good, specifically meet the demands as follows: in temperature is to work 200 hours under 500 ℃ of environment, non-scale, does not come off, does not loosen.
Repairing sizes with high-pressure turbine axle journal Φ 242.5 surfaces is a preference; According to the parts repair demand; While is according to the operating mode of navigation mark and part; The utility model specifically adopts chrome-plating method to pass through the plating to test piece and testpieces, successfully repairing sizes has been carried out on high-pressure turbine axle journal Φ 242.5 surfaces, has satisfied requirement.And test to situation such as the hardness of the coating of this material under different condition, bonding forces.
The result shows, can adopt electrodeposited chromium technology in the reparation of high-pressure turbine axle journal Φ 242.5 surperficial lopsided wears.After test run, check, in good condition, the use of can installing.
According to professional general knowledge, in the electrodeposited chromium production process, because the covering power of chromium plating solution is very poor; The current density of using is bigger; Desire obtains the uniform coating of thickness, must design suitable anchor clamps, even uses measures such as supplementary anode, protection negative electrode and insulation shielding.But because the structure of anchor clamps normally decides according to shape, size and the complexity of part.The material that uses must not produce dissolving and other chemical action in chromium plating solution, current-carrying part will have enough sectional areas, to guarantee that electric current passes through smoothly.
The utility model is through using supplementary anode; Solved the uneven problem of high-pressure turbine axle journal inner chamber narrow limit thickness of coating, the ovality after the plating of high-pressure turbine axle journal is controlled in 0.02, does not increase the ovality of workpiece; It is 1.6 μ m that surfaceness reaches Ra; Coating and matrix bond are good, are long term operation under 500 ℃ of environment in temperature, non-scale, do not come off, loose.The result shows that the said method of employing the utility model is reliable and stable, has the irreplaceable advantage of additive method.
The material of supplementary anode 1 is preferably lead antimony alloy (antimony content is at 6%-8%), and perforate guarantees that exhaust and solution circulate smoothly above supplementary anode 1; Supplementary anode 1 usefulness screw 2 is fixed on the end face insulcrete 7 of Vybak material; Supplementary anode 1 remains on about 30cm with part 6 distances; Prevent that supplementary anode 1 from contacting the generation electric burn with part 6; Non-surfacing all uses the insulcrete of Vybak material to carry out insulation protection, exposes the position of required plating, to reduce current draw.
Supplementary anode 1 usefulness screw 2 is fixed on the end face insulcrete 7 of Vybak material, makes endoporus concentric with supplementary anode 1, can make part 6 carry out electrodeposited chromium processing.
The high-pressure turbine axle journal chromium coating that the utility model uses special-purpose supplementary anode 1 to process, qualification rate be up to 100%, for the jig Design of similar workpiece provides reference.The chromium coating of trial edition method preparation, steady quality, technology is simple, and is easy to operate, shortened production setup time, improved production efficiency.
The manufacturing expense of the special-purpose supplementary anode 1 of this high-pressure turbine axle journal electrodeposited chromium is lower, and the benefit of generation is big, if processing about 40 parts every year, after every repairing cost-saved 350,000 yuan, the annual cost of practicing thrift can reach 1,400 ten thousand yuan; The utility model economic worth is huge.
According to the correlation technique requirement,, also require not increase the ovality of part 6 simultaneously, sufficient surfaceness requirement for solving the uneven problem of high-pressure turbine axle journal inner chamber narrow limit thickness of coating.If use general electrodeposited chromium method, the high-pressure turbine axle journal can not get desirable chrome-plated surface, even possibly cause part 6 to be reprocessed, thereby influences the quality and the qualification rate of product.Therefore, special-purpose supplementary anode 1 and other jig Design structure must be rationally, and requirement must be considered plan from point of view of practicability, otherwise can't meet design requirement.
The utility model is to high-pressure turbine axle journal inner chamber, narrow limit features of shape; Design the special-purpose supplementary anode 1 of electrodeposited chromium; Supplementary anode 1 remains on about 30cm with part 6 distances; Supplementary anode 1 width is a times by plating surface, and epimere and part 6 are connected the carbon steel sheet that adopts behind the 4mm by surfacing and are used as and protect negative electrode 5, so that make electric force lines distribution even.The high-pressure turbine axle journal has obtained electrodeposited chromium layers thickness uniformity in standard chromium plating solution, ovality 0.02 in; It is 1.6 μ m that surfaceness reaches Ra, the chromium coating that coating and matrix bond are good, constant product quality; Qualification rate reaches 100%, satisfies the design paper requirement.
The special-purpose supplementary anode 1 of the utility model employing is assisted and is carried out the chromium plating operation; The chromium coating of technical requirements is satisfied in preparation on the workpiece of the narrow limit of internal diameter; Make the electric force lines distribution in the workpiece electrodeposited chromium process of the narrow limit of inner chamber even, the coating uniformity does not increase the ovality of workpiece after the chromium plating.Through repairing, in the work-ing life that can improve workpiece, reduce the engine production cost; The utlity model has expected comparatively huge economic and social value.
Description of drawings
Fig. 1 is the narrow limit chromium plating of a high-pressure turbine axle journal internal diameter principle schematic;
Fig. 2 is the hardness situation of electrodeposited chromium layers under the different heat treatment temperature.
Embodiment
Embodiment 1
Supplementary unit is used in the narrow limit chromium plating of high-pressure turbine axle journal internal diameter, is used for fixing by the plating part, and cooperates the auxiliary chromium plating operation of carrying out together with supplementary anode 1; It is characterized in that: it is made up of following several parts: screw 2, negative electrode conducting plates 3, ring-type insulcrete 4, protection negative electrode 5, end face insulcrete 7, taper insulcrete 8, inner chamber protective sleeve 9; Wherein:
Inner chamber protective sleeve 9 is arranged in by in the inner chamber of plating part 6, and inner chamber protective sleeve 9 main bodys are tubular structure, and its outer end is the annular end face perpendicular to axis direction, and it is connected as a whole with the tubular structure partial fixing of main body;
Taper insulcrete 8 is arranged in and on the pyramidal structure medial surface of plating part 6 and through the annular end face of outer end in the inner chamber protective sleeve 9 it is plated part 6 fixed and arranged together with respect to quilt;
Said supplementary anode 1 satisfies following requirement: its main part is a disk-like structure, is fixedly connected with an axial column or tubular structure and this structural arrangement on this disk-like structure spare and is plating part 6 one sides away from quilt;
One of them contacts the axial sides of end face insulcrete 7 with inner chamber protective sleeve 9 China and foreign countries' end axis annular end face laterally, and another axial sides of end face insulcrete 7 and the disk-like structure of supplementary anode 1 partly are in contact with one another;
Supplementary anode 1, end face insulcrete 7, inner chamber protective sleeve 9 threes are fixed together through axial arranged screw 2;
As being furnished with protection negative electrode 5, ring-type insulcrete 4, negative electrode conducting plates 3 vertically successively on the outside anchor ring structure that is needed chrome-plated surface by the narrow limit of internal diameter of the high-pressure turbine axle journal of plating part 6; Wherein: the axial two sides of protection negative electrode 5 contact with ring-type insulcrete 4 respectively with by the above-mentioned position of plating part 6, and the axial two sides of ring-type insulcrete 4 contact with negative electrode conducting plates 3 with protection negative electrode 5 respectively.
With above-mentioned high-pressure turbine axle journal internal diameter narrow limit chromium plating with in the corresponding narrow limit of the high-pressure turbine axle journal internal diameter chrome-plating method of supplementary unit; Satisfy following requirement successively: at first taper insulcrete 8 is installed on the pyramidal structure medial surface of part; Inner chamber protective sleeve 9 is installed on part then, and the annular end face through outer end in the inner chamber protective sleeve 9 with taper insulcrete 8 with respect to part 6 fixed and arranged together;
Afterwards, end face insulcrete 7 is installed, one of them that makes its two axial sides and inner chamber protective sleeve 9 end axis annular end face laterally at home and abroad contact, and another axial sides of end face insulcrete 7 and the disk-like structure of supplementary anode 1 partly are in contact with one another;
Again, supplementary anode 1 is installed, and supplementary anode 1, end face insulcrete 7, inner chamber protective sleeve 9 threes are fixed together through axial arranged screw 2;
On the outside anchor ring structure that needs chrome-plated surface as the narrow limit of the internal diameter of the high-pressure turbine axle journal of part 6, arrange following three more then vertically successively: protection negative electrode 5, ring-type insulcrete 4, negative electrode conducting plates 3; Wherein: the axial two sides of protection negative electrode 5 contact with ring-type insulcrete 4 with the above-mentioned position of part 6 respectively, and the axial two sides of ring-type insulcrete 4 contact with negative electrode conducting plates 3 with protection negative electrode 5 respectively;
Negative electrode conducting plates 3, supplementary anode 1 are connected with the power supply of electroplanting device respectively, and this structural arrangement is away from part 6 one sides;
The link position of supplementary anode 1 is at the place, the hole that is used to connect of its column of arranging vertically or tubular structure part, the link position of negative electrode conducting plates 3 at it away from ring-type insulcrete 4 places;
The equipment that starts at last carries out the chromium plating operation to the narrow limit of high-pressure turbine axle journal internal diameter.
The narrow limit of said high-pressure turbine axle journal internal diameter chrome-plating method satisfies following requirement:
Operational path is: oil removing → clamping → activation → chromium plating → recovery trough washery → dehydrogenation;
Press the processing of chrome-plated process rules; The processing parameter that requires is following: chromic anhydride: 200～250g/l, sulfuric acid: 2～2.5g/l, trivalent chromium: 2-7.5g/l, temperature: 50-60 ℃, current density: 40-60A/dm
2
The narrow limit of said high-pressure turbine axle journal internal diameter chrome-plating method satisfies following requirement: ovality is controlled in 0.02; Surfaceness reaches Ra=1.6 μ m;
Require coating and matrix bond good, specifically meet the demands as follows: in temperature is to work 200 hours under 500 ℃ of environment, non-scale, does not come off, does not loosen.
Present embodiment is to high-pressure turbine axle journal Φ 242.5 surface sizes as part 6 as shown in Figure 1; Owing in repairing assembling process,, have the dimension overproof problem when dish cooperates in the whirlpool because of serious wear; Have a strong impact on normal assembling, thereby cause and normally to be delivered for use by node.Specially select a kind of coating of working under 500 ℃ of left and right sides temperature of being adapted at for this reason, solve the overproof problem of high-pressure turbine axle journal Φ 242.5 surface sizes.Accomplished successful reparation through a large amount of tests, obviously improved the work-ing life of part 6, reached the purpose that reduces the overhaul cost high-pressure turbine axle journal Φ 242.5 surface sizes.
According to the requirement of high-pressure turbine axle journal Φ 242.5 surface sizes wearing and tearing recovery scenario meeting, carried out high-pressure turbine axle journal Φ 242.5 surface sizes and adopted the electrodeposited chromium process method to carry out the technological test tackling key problem work of repairing sizes.
High-pressure turbine axle journal Φ 242.5 surface sizes are carried out chromium plating, and thickness of coating is between 20～50 μ m.And be controlled at Φ 242.5
+ 0.027In the scope, the matching requirements with the high-pressure turbine dish are satisfied in surface roughness Ra=1.6.
The high-pressure turbine axle journal is the major parts of high pressure rotor, and the working temperature of part is not more than 500 ℃, and working medium is an air, also has a spot of oiliness atmosphere.Number of moving part is 11330 rev/mins.Part is the bell mouth shape structure, has 24 holes to be connected with the rear end of the turbine disk.Workpiece lumen is embedded with also that resistance to corrosion is poor, surface carburization and non-detachable carbon steel lining.
The material of high-pressure turbine axle journal belongs to superalloy GH698.Density is 8.31g/cm
3, hardness value is RC27～35 (HV268～329).This alloy is with the ni-base wrought superalloy of Ni3 (AlTiNb) phase ageing strengthening, and 20% γ ' phase is arranged in the alloy, ℃ has higher creep rupture strength, tensile strength and good plasticity at (550-800).Life-time service, tissue is stable, and has excellent comprehensive performances.This material is usually used in the turbine disk, compressor disc, the inducer that temperature is worked under 550-800 ℃ of environment, heavy ring works long hours with other and has the engine component of heavy loading.The main alloy element and the content of this material are seen table 1.
Table 1GH698 main alloy element and content
Test piece: the make a service test test piece of usefulness of this tackling key problem is the GH698 identical with part material.The correlation circumstance of test piece is seen table 2.
The table 2 sample trade mark and specification
| Material mark | Specification (mm) | Quantity | Roughness (Ra) | Purposes |
| GB698 | 80 * 20 * 2 | 12 | ≤0.8 | Survey bonding force |
| GH698 | 10 * 20 * 2 | 20 | ≤0.8 | Survey surface hardness |
The part that this tackling key problem tries to plate reparation is an overhaul or secondary overhaul state, overproof of fitted position.The plating technology of testpieces is electrodeposited chromium.
Other material that uses: thinner, absorbent cotton, medical zinc oxide adhesive plaster, various relevant tank liquors etc.
Equipment: chrome-plating bath, the chromium plating power supply, the electrolyzer of all size, the dehydrogenation stove, (0-300) ℃ thermostatic drying chamber, in warm processing stove, ∏ MT-3 microhardness tester made in Russia etc.
Technology: the chromium plating typical process of high-pressure turbine axle journal Φ 242.5 size electrodeposited chromium technological basis HB/Z5072-92 " electrodeposited chromium technology " establishment.Electrodeposited chromium technology is very sophisticated repairing sizes technology, the thickness range of reparation wide (3～200) μ m, and coating hardness is high, and wear resistance is good, uses also very extensive.
When electrodeposited chromium was repaired, because this part needs surfacing very narrow, chromium plating current efficiency was low again, and dispersive ability is poor.For ensuring the quality of products, must design the homogeneity of suitable supplementary anode control thickness of coating.At present, the part of an overhaul needs (single face) reparation to be of a size of (20～40) μ m;
The part of secondary overhaul needs (single face) reparation to be of a size of (30-50) μ m.The size that the part of indivedual serious wear needs (single face) to repair reaches more than the 50 μ m.Because of all there is ovality in various degree in part, the part ovality that has is overproof serious, and difficulty was very big when the reparation size reached 0.05mm.Through the technical Analysis to part, electrodeposited chromium can be applied to the examination of high-pressure turbine axle journal Φ 242.5 surface sizes and repair.
Operational path: oil removing → clamping → activation → chromium plating → recovery trough washery → dehydrogenation.
By the processing of chromium plating works process specification (WPS), processing parameter is following: chromic anhydride: 200～250g/l, sulfuric acid: 2～2.5g/l, trivalent chromium: 2-7.5g/l, temperature: 50-60 ℃, current density: 40-60A/dm
2
Chromium coating adopts the hydrochloric acid of 1:1 to remove the chromium layer by the chromium plating works process specification (WPS);
The part situation is repaiied in the electrodeposited chromium examination: chromium layer smooth in appearance was careful after plating was repaiied in the examination of chrome-plated process electrodeposited chromium, accord with Q 3B/406-92 chromium coating quality control standards (QCS).
Examination is repaiied the part label and is respectively: 069,040,060,199.Size, thickness of coating, ovality, the roughness changing conditions on part Φ 242.5 surfaces are seen table 3 to table 6 before and after the plating.
Correlation circumstance before and after table 3069 electrodeposited chromium
Annotate: 069 preceding surfaceness of plating is to be recorded by measurement centre.
Correlation circumstance before and after 040 electrodeposited chromium of table 4
Correlation circumstance before and after 060 electrodeposited chromium of table 5
Correlation circumstance before and after 199 electrodeposited chromiums of table 6
Data statistics from table 3 to table 6 can be found out: the electrodeposited chromium process, almost do not strengthen the ovality of part.This mainly is because the special-purpose chrome-plating clamp (see figure 1) that designs voluntarily of present embodiment, be to 069 testpieces through 5 degree of executing repeatedly, and carried out repeatedly designing on the basis of actual mapping, satisfy drawing requirement fully.Its pictograph is very reasonable, result of use good.This is to adopt the electrodeposited chromium method successfully to repair the key of this part.
The electrodeposited chromium renovation technique satisfies drawing requirement fully.
Surfaceness: the schema of axle journal requires to be of a size of 242.5
+ 0.027, ovality 0.02mm.Surfaceness is Ra1.6.It is generally acknowledged that this type of Part Surface Roughness should reach Ra1.6.Results measured (unplated pieces) is seen table 7
Workpiece plating back table roughness (visual) is repaiied in table 7 examination
| PN | 069 | 040 | 199 | 060 |
| The average Ra of roughness | 0.8 | 1.6 | 1.6 | 1.6 |
The roughness on surface, part plating back is variant.Along with the increase of thickness of coating, the roughness of piece surface can increase.
Discussion of results and analysis:
1) coating performance test and discussion: the processing condition plating that test piece employing to be measured is identical with tested parts.Thickness of coating is 30～40 μ m, with the homemade ∏ MT-3 of Russia microhardness tester, records the microhardness values of coating under the different heat treatment temperature.
The hardness situation of electrodeposited chromium layers is seen table 8 and Fig. 2 under the different heat treatment temperature.
The hardness of table 8 different heat treatment temperature chromium coating
Institute's column data can be found out from table 8 and Fig. 2, and the hardness of chromium coating is far longer than the hardness of matrix, can satisfy the requirement of part operating mode.But because coating hardness is high, difficulty of processing is big, requires in the accessory size repair process, and thickness of coating can accurately be controlled.
Binding force of cladding material test:, adopt file method and simulated condition condition to adopt harsh thermal shock method inspection chromium coating bonding force according to the regulation of the 15th of HB5041; See table 9, table 10.
Table 9 file method inspection chromium coating bonding force
Table 10 simulated condition condition different heat treatment temperature chromium coating bonding force
The condition of surface of test piece under the differing temps: when the treatment temp of electrodeposited chromium test piece reaches 450 ℃; Chromium coating begins that slight light blue sull is arranged, but rete is unloose, not loss of gloss; When the treatment temp of the constant basically test piece of hardness reaches 500 ℃; Chromium coating begins to occur the blue oxide film, but rete is unloose, and hardness slightly increases.
The treatment temp of test piece reaches 600 ℃, and chromium coating begins to occur black-and-blue sull, and rete is slightly loose, and hardness descends to some extent.
The present embodiment conclusion: adopt the electrodeposited chromium process method to repair high-pressure turbine axle journal Φ 242.5 surface sizes, feasible process, reliable in quality can satisfy the repairing requirement.Behind factory test, check, in good condition, the use of can installing.
The bonding force of electrodeposited chromium layers and GH698 matrix is good.Surfaceness meets the schema requirement.
Be not more than 0.02mm for ovality, abrasion size (single face) is not more than the high-pressure turbine axle journal of 50 μ m, can adopt the method reparation of electrodeposited chromium.
Claims (1)
1. supplementary unit is used in the narrow limit chromium plating of high-pressure turbine axle journal internal diameter, is used for fixing by the plating part, and cooperates together to assist with supplementary anode (1) and carry out chromium plating and operate; It is characterized in that: it is made up of following several parts: screw (2), negative electrode conducting plates (3), ring-type insulcrete (4), protection negative electrode (5), end face insulcrete (7), taper insulcrete (8), inner chamber protective sleeve (9); Wherein:
Inner chamber protective sleeve (9) is arranged in by in the inner chamber of plating part (6), and inner chamber protective sleeve (9) main body is a tubular structure, and its outer end is the annular end face perpendicular to axis direction, and it is connected as a whole with the tubular structure partial fixing of main body;
Taper insulcrete (8) is arranged in and on the pyramidal structure medial surface of plating part (6) and through the annular end face of outer end in the inner chamber protective sleeve (9) it is plated part (6) fixed and arranged together with respect to quilt;
Said supplementary anode (1) satisfies following requirement: its main part is a disk-like structure, is fixedly connected with an axial column or tubular structure and this structural arrangement on this disk-like structure spare and is plating part (6) one sides away from quilt;
One of them contacts the axial sides of end face insulcrete (7) with inner chamber protective sleeve (9) China and foreign countries' end axis annular end face laterally, and the disk-like structure of another axial sides of end face insulcrete (7) and supplementary anode (1) partly is in contact with one another;
Supplementary anode (1), end face insulcrete (7), inner chamber protective sleeve (9) three are fixed together through axial arranged screw (2);
As being furnished with protection negative electrode (5), ring-type insulcrete (4), negative electrode conducting plates (3) vertically successively on the outside anchor ring structure that is needed chrome-plated surface by the narrow limit of the internal diameter of the high-pressure turbine axle journal of plating part (6); Wherein: the axial two sides of protection negative electrode (5) contact with ring-type insulcrete (4) respectively with by the above-mentioned position of plating part (6), and the axial two sides of ring-type insulcrete (4) contact with negative electrode conducting plates (3) with protection negative electrode (5) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205297069U CN202482457U (en) | 2011-12-18 | 2011-12-18 | Auxiliary device for high pressure turbine journal inner diameter narrow side chromium plating |
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| CN2011205297069U CN202482457U (en) | 2011-12-18 | 2011-12-18 | Auxiliary device for high pressure turbine journal inner diameter narrow side chromium plating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104651916A (en) * | 2013-11-19 | 2015-05-27 | 铜陵三佳山田科技有限公司 | Electroplating pretreatment process for insert surface and EDM deep cavity |
| CN109402687A (en) * | 2018-11-27 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | Ball cup surfaces externally and internally chrome-plating device |
| CN109402691A (en) * | 2018-11-27 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | A kind of aperture chrome-plating device |
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2011
- 2011-12-18 CN CN2011205297069U patent/CN202482457U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651916A (en) * | 2013-11-19 | 2015-05-27 | 铜陵三佳山田科技有限公司 | Electroplating pretreatment process for insert surface and EDM deep cavity |
| CN104651916B (en) * | 2013-11-19 | 2017-04-19 | 铜陵三佳山田科技有限公司 | Electroplating pretreatment process for insert surface and EDM deep cavity |
| CN109402687A (en) * | 2018-11-27 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | Ball cup surfaces externally and internally chrome-plating device |
| CN109402691A (en) * | 2018-11-27 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | A kind of aperture chrome-plating device |
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